germany-jülich: engineering services./ work agreement elt planning./ the contractor (an) should support the client (ag), in particular the electrical engineering department (b-e), in the performance of its tasks as flexibly and quickly as possible through its planning service. the planning is broken down according to cost groups according to din 276 or hoai §53 as follows: kg 400 structural engineering systems • kg 440 high-voltage system / system group 4 - zone i to iii, • kg 450 telecommunications and information technology systems / system group 5 - zones i to iii, the service can be called up by the client in partial services from all service areas to be provided.